Insulation Resistance Tester with Remote Dead Man Switch
Insulation Resistance Tester with Remote Dead Man Switch
(OP)
Do any of you know of an insulation resistance tester (0 - 2500 V) that incorporates a remote dead man switch feature? We are getting ready to do a lot of insulation resistance testing on new construction in an industrial plant. I've been doing megger testing the old school way for years, but would feel a whole lot better if the person at the remote end of the cable had a 'dead man switch' he could attach between a phase conductor (not under test) and ground. He could then depress and hold that switch, which would then allow the megger at the other end of the cable to apply test voltage to the cable. If the person holding the dead man switch were to let go, the megger would automatically remove the test voltage.
If you've heard of such an animal, can you point me to a make and model?
Thanks!
If you've heard of such an animal, can you point me to a make and model?
Thanks!
J.R.
Galatians 2:20






RE: Insulation Resistance Tester with Remote Dead Man Switch
I'm not familiar with an application you are searching for. We've always done it safely via operation/testing procedures.
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RE: Insulation Resistance Tester with Remote Dead Man Switch
RE: Insulation Resistance Tester with Remote Dead Man Switch
RE: Insulation Resistance Tester with Remote Dead Man Switch
As a result, the early regulations were changed and locking out by locking out a control circuit was not recognized.
If you do not learn from history you may be doomed to repeat it.
Most implementations of a "dead-mans-switch" would depend on trusting a control circuit. A failure in the control circuit may leave the cable energized when the operator believes it to be safe.
The first danger of contact with a megger output is the physical reaction. Falling off of a ladder or other inadvertent movement.
The second danger is that a very long cable may store a large enough capacitive charge to be lethal.
Bill
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"Why not the best?"
Jimmy Carter
RE: Insulation Resistance Tester with Remote Dead Man Switch